Speaking to Huffington Post founder Arianna Huffington for Interview magazine, she said: "I don't have a Facebook or a Twitter account, and I don't know how I feel about this idea of, 'Now, I'm eating dinner, and I want everyone to know that I'm having dinner at this time,' or 'I just mailed a letter and dropped off my kids.'

"That, to me, is a very strange phenomenon. I can't think of anything I'd rather do less than have to continuously share details of my everyday life."

Johansson, whose private nude snaps hit the web in September after a hacker tapped into her email account, also said she was "always surprised" that so many of her fellow actors impart with personal information over the platforms.

"I guess they use it in a way that works for them," she said. "But I'd rather that people had less access to my personal life. If I could keep it that way, I'd be a happy lady.'"

Explaining why she's so fiercely protective of her private life, she added: "My favourite actors are actors who are enigmatic and mysterious and never make the obvious choice in terms of the projects they do or who they work with or their craft," Johansson said.

"I think that the less I know about an actor, the more chance I have of allowing their own persona to kind of slip away so I can get completely lost in the character they're playing. The more that people think they know about your personal life, the more difficult it becomes to preserve that."